Jake Gyllenhaal introduced a new mystery woman to his sister Maggie Gyllenhaal and her husband Peter Sarsgaard at Giorgio Baldi Thursday night.

Jake Gyllenhaal with Kirsten Dunst at the premiere of "The day after tomorrow" on 26th May, 2004 in LondonJake Gyllenhaal with Reese Witherspoon arriving at Staples Center in LA on 4th January 2009

The Prince of Persia actor, who hasn't been serious with anyone since splitting with girlfriend Reese Witherspoon, made sure his dinner date snuck out of the restaurant after him, but X17online caught a glimpse of the couple when she drove them out of the parking lot! Source: x17online.com